21239960

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{2447}}^1$

素因数の和:2496

約数の個数: 64

約数和(自身を含む): 56401920

約数和(自身を除く): 35161960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 31, 35, 40, 56, 62, 70, 124, 140, 155, 217, 248, 280, 310, 434, 620, 868, 1085, 1240, 1736, 2170, 2447, 4340, 4894, 8680, 9788, 12235, 17129, 19576, 24470, 34258, 48940, 68516, 75857, 85645, 97880, 137032, 151714, 171290, 303428, 342580, 379285, 530999, 606856, 685160, 758570, 1061998, 1517140, 2123996, 2654995, 3034280, 4247992, 5309990, 10619980, 21239960]

約数ペア:

[(1, 21239960), (2, 10619980), (4, 5309990), (5, 4247992), (7, 3034280), (8, 2654995), (10, 2123996), (14, 1517140), (20, 1061998), (28, 758570), (31, 685160), (35, 606856), (40, 530999), (56, 379285), (62, 342580), (70, 303428), (124, 171290), (140, 151714), (155, 137032), (217, 97880), (248, 85645), (280, 75857), (310, 68516), (434, 48940), (620, 34258), (868, 24470), (1085, 19576), (1240, 17129), (1736, 12235), (2170, 9788), (2447, 8680), (4340, 4894)]